#include<stdlib.h>
#include<stdio.h>
int main() {
	char arr1[] = "hello,world";
	char arr2[] = "###########";
	int left = 0;
	int right = sizeof(arr1) / sizeof(arr1[0]) - 2;
		while (left <= right) {
		arr2[left] = arr1[left];
		arr2[right] = arr1[right];
		printf("%s\n", arr2);
		left++;
		right--;
	}
	return 0;
}